I had both problems on iOS 14.7 and have it in the latest iOS 15 beta.
a) freeze on launch ā which I can mitigate by using āFilesā app and forcing iCloud sync before launching Obsidian, this feels related to vault search indexing
b) freeze in use ā which I can mitigate by detaching the Apple brand external keyboard
c) problem not mentioned above: some keystrokes will not go from external keyboard to Obsidian regardless whether itās being responsive, until I detach keyboard, force quit Obsidian, attach keyboard, and relaunch Obsidian
Combination of Obsidian, vault in iCloud, and Appleās external trackpad keyboard for 2020 iPad Pro. I have to detach the keyboard to get Obsidian to interact with me again, or wait seconds to minutes.
I have a decade of markdown notes in subfolder hierarchy.
vault1: 3606 items, 370MB
vault2: 3810 items, 2GB
I carved vault2 out as it had PDF and image attachments
Per a question higher up in the thread, some of the .md files have incidental inline HTML, but are not .html files called .md.