Gist editing jumps to add typed text at EOF

[skull-squadron]

0. Be sure the predictive keyboard is on.
1. Create a markdown gist with a long list of unnumbered bullets ("-") without leading indentation.
2. Edit the gist's file in CodeHub.
3. Insert a new line, type "-", space and more text.
4. Watch as it skips around to the end briefly and your text doesn't appear where it should.

• iOS: 12.4.1 on a smaller screen device
• CodeHub: latest as of writing on IAS