There are more Chinese interdictions and intercepts of fucking Canadian and Australian aircraft than of Indians. (In fact, I cannot find a SINGLE picture of an Indian intercept by China or vice versa despite the Indian bullshit about the MKI being able to detect the J-20 a thousand miles in China about 7 or 8 years ago when there were none in Tibet.)
Obvious answer is that there's no international waters in question. Aka intercept can happen only if border is crossed, which is a major accident. Sides can fly around on their sides of the border, and the border there isn't exactly conductive for meddling with each other (Himalayas are high enough to interfere with air ops).
And yes, in practice Canadians and Australians are more hostile towards China than India. As they willingly cross from afar to mess around.
Aka, Indian hostility to China is historical and tied to actual areas with very uneasy history. "Eyes" and NATO create problems very much on purpose, even when just reaching these areas is a significant undertaking.