Unfortunately I have the same issue with deposit ETH from BITSTAMP.

Bitstamp uses contract transfer, so it is internal ETH transfer. This type of transfer is Liqui not able to process. The ETH are on Liqui ETH deposit address, but not credited to your wallet.

THIS IS SERIOUS ISSUE!

The worst is that my support ticket #25312 about this problem is processed for 18 days(!) without any reply.

Very sad.