Converting VHS get flashes

Recently I bought the Intensity Shuttle to transfer my old video tapes (VHS) to my computer (Asus I9 with windows 10)
I now run into the following problem: Converting high quality tapes (TDK EHG) is no problem at all, but when I use a lower quality ban ( TDK HG) I get flashes through my image.
In both cases I use the following setting:

Video Output: 625i/50PAL
Analog Video Output Levers : 7.5 (USA)

Video Input:
composite
Analog video output :7.5 (USA)

audio:
Analog Audio Input Levels

conversions:
Input: none
output: none

Does anyone know a solution to this problem.
Thanks in advance for thinking along

Dick

You may need a TBC (Time Base Corrector).

Thanks for your suggestion, but why do EHG (Extra High Grade) tapes convert well and HG tapes don't.
If I use the same video tapes in a Pinnacles conversion system, it all works fine (with slightly lower quality)

I am familiar with TB, but I wonder why an EHC (extra high grade) videotape is converted properly, but an HG tape is not.
If I use another program (e.g. Pinnacle) this does not cause any problems (but a lower quality).
Is there anything to change the settings so that the conversion goes well in both cases?
WHO HAS A SOLUTION?

Sounds like you need a TBC. Different tools will have different tolerances for drift, and BMD tools have a very low tolerance. That's probably why HG does not work, but EHG does.

Thanks for your comment Jack Fair
I will look for a video recorder with TBC and if that costs too much I will use Pinnacle again, which accepts everything but with a lower quality.
I am an amateur and it must be . considering the cost, we; stay nice.

It may not cost you too much to buy a TBC second-hand and sell it again after the project.