Revolve get stuck on render a video in 4K

I did a project with DaVinci Resolve Final V15 with about 100 short videos and approx 400 picture and several audio tracks. Everything went well exact some smaller issues, but there was a workaround every time.
The timeline (UDH resolution) is now 15 minutes long and I tried to render a video.
Rendering works fine for Full HD, but it get stuck when doing the same in UHD (4K) every time on the same item which is a fusion text title. I used different output formats and quality settings without any different where Resolved get stuck. Basically it could be a file limit of 2 GB about with lower quality setting the file size was about 1.8 GB.

Does anybody has an idea how to get a rendered video in such a painful situation?

Regards,
Christian

[Peter Chamberlain]

Some system, timeline and clip info might help. please see
viewtopic.php?f=21&t=71894

Hello,

I thought that I did a reply last night but now I can't see this reply here.
Therefore I do it again.

I uploaded some useful files at my dropbox but I can' write the url here. Maybe I can sent you link by mail ?
The files are the diagnostics log, the exported project , the whole rendered video in HD quality and test.mov which contain the related range in 4K (UHD) which makes Resolve to get stuck when I render the while timeline in 4K. The problem is depending on 2 Fusion text items at 12:31-12:50 (in the timeline). When I delete those 2 items I can render the while timeline in any resolution without any problem.

About my computer: i7 3th generation, 16GB RAM, enough disk space, GTX 1070 TI, Windows 10
I'm using the first final release Resolve 15 that was announced Aug 13th.

Kind regards,
Christian

One more maybe useful information:
I tried to render the project in 1280x720 resolution and it get stuck again but some seconds later in the timeline (approx at 13:05).

BR
Christian

Because I could write an URL here I wrote the link to my dropbox by a private message.

BR
Christian