1 Frame flicker after rendering

Hello Folks,
I have a problem with a video I'm supposed to deliver to a client. Basically, I edited an Instagram version of the commercial, which worked flawlessly. The client now wants a YouTube version and everything is on point except for the intro. I had the illustrator give me the 1080P version of the text in the beginning, which is a transparent PNG (100kb or something, really small) but for some reason Davinci seems to be bugging out. No matter what I do, it either keeps the dead frame or it simply puts the text on a black background, not showing the video at all. This is weird because it worked with the different aspect ratio. Everything works fine in the timeline, it's just after the render where this occurs.

Here's what I tried to fix the problem:

- Set Alpha Mode of the PNG to Premult
- Disabled Frame Reordering in Export
- Changed the output from MP4 to Quicktime (both with H264)
- Tried moving the whole timeline to the front so there is space in the beginning (actually worked once where I had the same issue)

Also important to note, that it takes around 1 minute to render 3 seconds where the JPEG is placed on top of the video.

Info:
-All video is recorded in B-Raw 12-1.
-The file is a PNG Transparent file (242 KB)
- Rendering Settings: 1920x1080P ; H 264 Native; 24 FPS; 8000Kbs; Frame Reordering enabled;
Advanced Settings: Reencoding bypassed; Sizing and force debayering to highest quality;

PC specs:
AMD Ryzen 5 2600 Six-Core Processor 3.40 GHz
RAM: 16,0 GB
Windows 10 64-Bit
GeForce RTX 2060; NVIDIA Studio Driver ver. 462.59


Any help would be appreciated.

Cheers!




*UPDATE*
I fixed the problem by simply exporting the PNG as a TIFF and adding it to the video. Apparently Davinci is allergic to PNGs, so if you ever face a problem like this use TIFF images.