Yes, that contrast is the intended effect. According to the product information, Palacio Cannabis Flex massage gel is built around an alternating cool-warm sensation. Menthol, peppermint oils and eucalyptus create an immediate cooling feeling on the skin, while camphor brings a gentle warmth that balances the cooling. The combination is what makes a massaged area feel less stiff and more relaxed.
The sensation is not the same for everyone. On sensitive skin, or if you apply a thick layer, the cooling can feel more intense, and some people perceive camphor and menthol as warming after the initial cool phase. This is a cosmetic effect on the skin surface, not a sign that the product is heating or cooling the tissue in a medical sense.
You can use the sensation as a guide: if it stings, burns sharply, or causes visible redness, remove the product with a mild cleanser and do not continue use. A normal experience is a distinct but tolerable cool/warm feeling that fades gradually. For a gentler effect, use a smaller amount and spread it thinly; for a more noticeable sensation, apply more product to a larger area, but keep it away from sensitive zones like the face.