I'm having trouble because the drawing disappears.

We reported the same issue seven months ago, yet it still hasn't been fixed. Initially, we accepted it as an unavoidable part of the early development phase and planned to upgrade to a higher-tier paid plan once critical bugs were resolved. But why haven't these fundamental issues been addressed? Under these circumstances, we simply cannot feel comfortable paying for this service. Receiving sales notifications while this remains unresolved is frustrating.UI improvements and new feature additions can come later. I request that critical bugs be addressed promptly. Thank you for your attention.