Thank you, TW_Tones. That seems reasonable.
Yes, I always run my TWs from local storage. I believe someone once mentioned on here about how the browsers on Androids refresh unexpectedly. Actually Mark_S posted this: Save Your TiddlyWikis Without A Saver Or Plugin - #16 by Mark_S
Your first point: interacting with the save dialogue, gave me an idea; a workaround. I could just save the TW as normal and deal with the red "draft of"s later.