Have you ever fallen into a depressive episode while dating someone you really like, and then lose interest in them or not had the energy to respond?

Dated someone 2 weeks/three in-person dates and things were really good with constant communication. The person told me they get depressive episodes and self-isolate from time to time on our last date three weeks ago. They canceled two dates now and said they are in a particularly bad episode. 5 weeks since meeting and the last 3 weeks were increasingly spotty communication and three days I was left unread, when I asked if they wanted to date still since we’re exclusively dating for now (they initiated this). They eventually said they miss me but never answered my question. Person has been snapping and active on facebook from what I can tell while not answering me.

Should I assume they have lost interest and just move on, if they have the energy to communicate with others to some degree/go to work still? Or could this be true depression that took the reigns at a bad time?