Gaiad stuck on round number blocks

[simonecid]

Gaiad gets stuck on round block numbers (e.g. 12800000 and 13200000). Prior to getting stuck the log reported Dialling peer failures errors.
After restarting gaiad, the log reported gaiad being stuck on

executed block height=12800000 module=consensus num_invalid_txs=0 num_valid_txs=1

The only way I found to restore node functionality is to wipe its storage and sync it from an existing snapshot. During the catchup process the node had no problem processing the block on which it was stuck before.

Is this issue known? How can I prevent gaiad from getting stuck on these blocks?

Additional info

I start the gaiad from an existing snapshot via quicksync:

gaiad start --home /var/lib/atom --x-crisis-skip-assert-invariants

I use the default configuration with custom pruning:

pruning = "custom"

# These are applied if and only if the pruning strategy is custom.
pruning-keep-recent = "400000" # 390k blocks per month
pruning-keep-every = "0" 
pruning-interval = "100000" # cleans at a week interval
min-retain-blocks = 400000