[Sega Mega Drive] Sonic 1 Megamix SHC 2006 and 2007 builds

[freq-mod]

Describe the issue
Old builds of this ROM hack exhibited a problem where game would crash on certain occasions, in case of SHC 2006 build it would crash on level load or option screen accessing, in case of SHC 2007 builds when jumping. These occur on real hardware, but not in inaccurate emulators... including Ares. On Ares these romhacks play perfectly, which isn't accurate to the real Mega Drives.

Video showcasing the problem: https://youtu.be/CWZtVb5FG2Q?si=sw06pi6p7O4SUS0S&t=224 (8:05 timestamp for 2007 build behaviour)

Rom Information

2007:
file: S1MM
serial: GM 00001009-00
sha256: 88d7df13a062926e45f8a2f827f1951cc32790a65fd8f6da49bf3540352c206e

2006:
file: Sonic 1 Megamix
serial: GM 00001009-00
sha256: 61f9c6d035cb0a0da4266cb0400afe52d9cdef283797709cab41b6ccf934bf93