Syncing is very slow after recover node from snapshot

Hey, after restoring a full archive node from an aws snapshot, starting heimdalld , waiting to sync and then start bor we got the following logs:

INFO [08-11|19:15:23.244] Looking for peers                        peercount=2 tried=62 static=0
INFO [08-11|19:16:06.455] Imported new chain segment               blocks=1 txs=224 mgas=20.621 elapsed=1m15.143s mgasps=0.274 number=17,866,823 hash=573dcd..e22d67 age=7h11m6s   dirty=0.00B
INFO [08-11|19:16:50.053] Imported new chain segment               blocks=1 txs=305 mgas=20.617 elapsed=43.597s   mgasps=0.473 number=17,866,824 hash=c6a042..1966f4 age=7h11m46s  dirty=0.00B
INFO [08-11|19:17:34.585] Deep froze chain segment                 blocks=2 elapsed=15.115ms  number=17,776,824 hash=0620d7..f29273
WARN [08-11|19:18:16.365] Header broke chain ancestry              number=17,877,002 hash=9679a8..fcd2f8
INFO [08-11|19:18:28.470] Imported new chain segment               blocks=1 txs=186 mgas=20.635 elapsed=1m38.416s mgasps=0.210 number=17,866,825 hash=b76378..f07b18 age=7h13m20s  dirty=0.00B
INFO [08-11|19:18:47.790] Imported new chain segment               blocks=1 txs=297 mgas=20.639 elapsed=19.320s   mgasps=1.068 number=17,866,826 hash=1372de..c97958 age=7h13m35s  dirty=0.00B
INFO [08-11|19:19:34.797] Deep froze chain segment                 blocks=2 elapsed=211.424ms number=17,776,826 hash=62b82a..b28111
INFO [08-11|19:20:15.410] Imported new chain segment               blocks=1 txs=153 mgas=20.656 elapsed=1m27.620s mgasps=0.236 number=17,866,827 hash=ef14aa..36ebd6 age=7h14m59s  dirty=0.00B
ERROR[08-11|19:20:33.450] Snapshot extension registration failed   peer=cb5b9771 err="peer connected on snap without compatible eth support"

and after few hours it’s a bit faster but still very slow

INFO [08-12|08:02:22.829] Imported new chain segment               blocks=2  txs=114  mgas=39.985  elapsed=16.787s   mgasps=2.382   number=17,872,652 hash=3008e8..1c4399 age=15h57m8s  dirty=0.00B
INFO [08-12|08:02:34.751] Imported new chain segment               blocks=2  txs=391  mgas=39.978  elapsed=11.922s   mgasps=3.353   number=17,872,654 hash=46ff61..af103a age=15h57m16s dirty=0.00B
INFO [08-12|08:02:43.021] Imported new chain segment               blocks=1  txs=184  mgas=19.993  elapsed=8.269s    mgasps=2.418   number=17,872,655 hash=0832dc..d61e65 age=15h57m23s dirty=0.00B
INFO [08-12|08:02:51.325] Imported new chain segment               blocks=2  txs=244  mgas=39.994  elapsed=8.304s    mgasps=4.816   number=17,872,657 hash=9f9fe7..cc3c91 age=15h57m27s dirty=0.00B
INFO [08-12|08:03:03.459] Imported new chain segment               blocks=3  txs=520  mgas=59.954  elapsed=12.134s   mgasps=4.941   number=17,872,660 hash=d83280..6246f5 age=15h57m33s dirty=0.00B
INFO [08-12|08:03:13.384] Imported new chain segment               blocks=2  txs=340  mgas=39.986  elapsed=9.925s    mgasps=4.029   number=17,872,662 hash=09c936..3a153c age=15h57m39s dirty=0.00B
INFO [08-12|08:03:22.186] Imported new chain segment               blocks=3  txs=520  mgas=59.969  elapsed=8.801s    mgasps=6.813   number=17,872,665 hash=66466b..0ca3f3 age=15h57m42s dirty=0.00B
INFO [08-12|08:03:32.331] Imported new chain segment               blocks=2  txs=167  mgas=39.989  elapsed=10.144s   mgasps=3.942   number=17,872,667 hash=4d508d..f91559 age=15h57m48s dirty=0.00B
INFO [08-12|08:03:42.122] Imported new chain segment               blocks=3  txs=538  mgas=59.967  elapsed=9.790s    mgasps=6.125   number=17,872,670 hash=264112..d0a941 age=15h57m52s dirty=0.00B

before was syncing normal but now it’s syncing with 1blk/>20s
I tried to remove the nodekey file but was the same. Heimdalld works good

Bor
Version: 1.10.3-stable
Git Commit: d33ce83cba5e1a1078e339882c048b9a8b210c69
Architecture: amd64
Go Version: go1.15.5
Operating System: linux
GOPATH=/root/go
GOROOT=/root/.go

any hints?

thanks