Investigate how pruning settings affect CL syncing

[linear]

Currently, there are a few cases of node operators who experience syncing issues after upgrading to the latest CL client. Upon upgrade, syncing works, but a few hundred blocks after the CL client stops syncing. As a temporary remedy, changing the pruning setting to NOTHING works - but resetting it back to DEFAULT (to prevent state bloat) causes the original issue to come back. We should investigate what exactly is causing this to happen.