Collaborative Edits Being Mangled

[CodeMouse92]

We have an .odt file (fairly large) that was uploaded to NextCloud. It opens fine, but when we start editing it, changes aren't exactly in sync. When the other person types a phrase, it appears in the wrong place/sequence on my end. If I fix it to the correct form on my end, it mangles it on the other person's end.

For example, when the other person has typed...

"Dad, I've got to see how far Spitfire has gotten with the bridge." Sunnéo hopped out of the car and clutched the paper bag holding the prince's treasure. "I'll see you after sunset."

I see...

"Dad, I've got to see how far Spitfire has gotten with the bridge." Sunnéo hopped out of the car and clutched the paper bag holding the prince's treasure. "I'll seeee ou after sunset."

If I fix it to the correct form, the other person sees.

"Dad, I've got to see how far Spitfire has gotten with the bridge.Su" Su o hopped out of the car and clutched the paper bag holding the prince's treasure. "I'll se you after sunset."

Server Environment

• Ubuntu 16.04 LTS x64 Server
• NextCloud 10
• Apache 2.4.18

Client Environment (both of us)

• Ubuntu 16.04 LTS x64
• Opera 41.0.2353.46