XMPlay seems to try to fade out the effected sample that StarWolf3000 found. OpenMPT doesn't do that and I don't think a MOD player should do that by default. You can remove the last few samples from sample 27 to remove that spike.
But I can't use them for conversion as they don't give the stereo separation like Open MPT.
If you want full stereo separation in XMPlay, you can find a pan separation setting in its MOD playback setting. By default it's set to 50 (equivalent to 100 in OpenMPT), but you can set it to 100 for full stereo separation.