Paul
You mentioned the fibre, but not what the fabric was.
If it's a flocked fabric, there's a risk of damage with Fabric Restorer as it contains solvent(s).
Also, the way you conducted your test isn't that indicative, especially with microsplitters. You should spray and towel immediately. During the dwell, the fabric may have become too dry. With most, but not quite all, cleaning systems, you should always agitate then dwell afterwards if required.
Safe and happy cleaning

Ken