Apologies if in wrong place but not sure where else to put it.
Ds is 11 months and since he was about 8 months he's been doing a version of his own crawling. Pulling himself with his arms flat on the ground in front of him (commando style) whilst pushing off with one knee.
He is still doing it despite getting on all fours and rocking. He pushes himself to a sit up position from all fours but refuses to crawl like it. If I hold his middle to try and get him to stay up he just whinges.
How can I encourage him to do a proper crawl instead of it commando style?