Anyone applied for a Thai Tourist Visa to use on a LATER trip (not the one right after applying)?

Question about timing/logistics rather than eligibility this time.

I'm planning to apply for a Thai Tourist Visa while in Indonesia (via the e-Visa system), but I won't actually be entering Thailand on that visa straight away. The plan is:

**1.**	Apply for the tourist visa now  
**2.**	Travel to Thailand in the meantime on a **visa exemption** (separate short trip)  
**3.**	Fly out to Indonesia for a few days  
**4.**	Fly back into Thailand afterwards and use  

the tourist visa I already have, to get the full 60 days

My understanding is that a single-entry tourist visa is valid for 3 months from the date of issue, and that entering on a visa exemption in between doesn't touch or invalidate the tourist visa sitting in my passport — they're processed completely separately at immigration.

Has anyone actually done this or had it confirmed by an embassy/immigration officer? Want to make sure there's no gotcha I'm missing (e.g. immigration assuming the visa is "used" once you've entered the country by any means, or flagging the pattern). Any firsthand experience appreciated.