Strictest answer: yes — it is best to avoid it.

In Jain Dharma, the most proper way to show respect is Namaskar / bowing respectfully, not kissing feet. Kissing feet involves physical contact and attachment, so from a very strict Jain view, it is not ideal.

Best Jain practice:

• Bow with folded hands
• Touch feet lightly only if traditionally appropriate
• Keep respect pure and simple

So, strictly speaking: yes, avoid it.