After I eat some foods beer tastes weird?
Even sugars can affect the flavour of the next mouthful or two. This includes the dextrose added to quite a lot of savoury snacks (and similar foods, often before cooking so it caramelises), which might explain why some crisps (chips) have this effect and others don't. I find that a couple of small sips are enough to restore taste to normal. 

Without rigorous testing I find that this reduces the flavour of a malty beer. More hoppy beers tend to taste more bitter after certain foods, but mainly sweet foods, so I've always put that down to the contrast in flavours. Again this is a short-lived effect.