IDW Sonic editor David Mariotte has confirmed that the mainline Sonic comic will not be running simultaneously with the Fang the Sniper mini series, and will insead be going on break over the course of its run. This confirmation came via his Bluesky Social account, when users Scurvey Piratehog asked why the comic's 69th issue was left out of the February solicitations. Mariotte stated that they wanted to "make space" for the Fang mini, and confirmed that the mainline comic would be back later in 2024 (presumably, once the Fan comic wraps up, which should be in April). For anyone without a Bluesky account, you can read the posts below:
The Fang mini series was confirmed last month, and will debut in January 2024. Special thanks to Fairguy for DMing me this on Twitter.