Metal Slug 6 graphic issues

[WangDrum]

hello.
I'm sorry if ever discussed this topic.
While playing AtomisWave Metal Slug6, which was fixed for Naomi, a graphic issue occurs when I obtain and throw 'fire' among the bomb items in the second stage.
The same problem occurs with Naomi 1 and 2, multibios, and regular bios. Of course, I also tried changing the region.
The problem is the same for the Red Blood version .bin file and the regular .bin file.
Does anyone know about this?

 

[Washp]

I haven't seen this before. it might be related to the monitor type. I've played the game in 15khz mode without this issue. some of the files in the netbooter are wonky. For example, radirgy noa has no music during gameplay if you set your cabinet to freeplay mode. but if you insert credits the music is there.

 

[WangDrum]

Same in 15khz mode.
If I run the .bin file in mame, there is no issue.
Even if I replace the motherboard or the DIMM board, the issue continues to occur.
I'm confused as to what the problem is.