The hose pulley can delete Wetstone blocks from the Wetstone mod when retracting.
Example:

This issue has been marked as stale because it has been inactive for 3 weeks. It will be closed if it remains inactive for another 3 weeks.

I've never been a fan of stale bots, they tend to close valid issues... regardless, I can confirm that this issue remains in the latest (1.16.5) versions of the mod.

This issue has been marked as stale because it has been inactive for 3 weeks. It will be closed if it remains inactive for another 3 weeks.

Ping. Likely still an issue, wetstone mod hasn't updated to 1.18.1 yet so can't verify there.

This issue has been marked as stale because it has been inactive for 3 weeks. It will be closed if it remains inactive for another 3 weeks.

Pinging incase this is something that may be addressed in the 1.16.5 version of the mod.
While I don't know of other mods like Wetstone, it is possible that others may have their blocks deleted by Create's pumps if it believes them to be a fluid source, which is why I believe this should be looked into regardless of game versions.

This issue has been marked as stale because it has been inactive for 3 weeks. It will be closed if it remains inactive for another 3 weeks.

Ping. I intend to do some testing and see if this occurs with other infinite water source blocks, as it stands this is likely still an issue.

I will test with the sink from cookingforblockheads and see if I can reproduce the issue.

I haven't been able to reproduce it with the sink; it seems to be behaving itself.