Bug using Title "Lower 3rd Simple Underline"

I used this Fusion Title in Resolve Studio Beta 3 & 4.
When I play the clip in edit for first time everything is ok, but when I play it for the second time the clip ist black - only the title is to be seen.
I used it before in the free Version Resolve Beta 3 and everything was ok.
My system:
Intel core-7 6700
Windows 10 Pro 1709
nvidia Geforce 1080
When I play the clip in edit for first time everything is ok, but when I play it for the second time the clip ist black - only the title is to be seen.
I used it before in the free Version Resolve Beta 3 and everything was ok.
My system:
Intel core-7 6700
Windows 10 Pro 1709
nvidia Geforce 1080