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So a few things come to mind that MIGHT be causing this.
So, to test each one lets start with the Battery.
Is it Fully charged? Does it have a battery indicator Light? How long was it charged for?
The interfearance can be solved by keeping the keyboard as close as possible to the iPad. If it is already as close as possible, try moving to a different location in your house or office, and see if the results are the same. If they are the same, then we can rule out the strong interfearance.
Leaving an option of a defective product. Has this keyboard always worked fine until today? Have you been able to pair this keyboard to a different bluetooth device (maybe an iphone or another laptop or something that you can pair a keyboard to) and it work properly? If the keyboard acts the same no matter which device you PAIR it to, and you have eliminated the above 2 possibilities....then i suggest you RETURN the keyboard to where it was purchased, and exchange it for a NEW one.
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May I ask how old the keyboard and the iPad Air 2 is?
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