You can use the x-callback-url support in Textastic to open or replace existing files and add new files from the Workflow app.

The x-callback-url API is documented at https://www.textasticapp.com/v4/manual/x-callback-url.html

Getting file contents is not yet supported (mainly for security reasons).

I had started working on it quite a while ago, but didn't finish. I do want to implement it for Textastic 7 along other major improvements, but didn't yet change the status from "Under review" to "Planned" because there are other things I need to finish first.

The document picker and iCloud Drive file selection UI is entirely provided by iOS itself. Unfortunately I cannot change this behaviour.

It would be up to Apple to implement this, so you might consider filing a bug report or send an enhancement request at http://www.apple.com/feedback/

I could now reproduce the issue. It happened more frequently when using Split View on iPad Pro.

This will be fixed in the next update!

I cannot seem to reproduce this issue on my iPad Pro. Which iOS version are you running? Does it always happen or can you tell me the steps to reproduce it?

Thanks for letting me know. I thought I had fixed this problem in the last update. I'll look into it again. As a workaround, I'd recommend to set the time before it locks to 1 minute instead of immediately.

If you don't want to share this information publicly, please send it to support@textasticapp.com, thanks!

I recently had another user report a similar problem. In their case, the hosting provider changed their ssh server settings to limit the number of supported ciphers. I guess that's the case here as well. I'm currently investigating which ciphers Textastic needs to support to solve this problem.

It would be helpful to know which hosting provider you are using and which host name you are trying to connect to.

This worked for me without problems on macOS Sierra 10.12.3: