Every time I slept in safehouse to skip Tide all items were kept. However after couple of tides I spend in base I came back to safehouse to get my meds and I discovered that all items were gone. I quickly run to the other safehouse, it was also cleared. I also noticed visible green box outlining safehouse space.
That was the very first time visiting safehouses after spending tide in base.
I play on Steam, Singleplayer and this save was made last weekend after game update (not transfered from beta3)